Calculate the t90 (shelf-life) for your unknown at 70 °C assuming the activation energy, Ea, for the process is 105 kJ/mol. Show all work. Symbolically state the equations you are using defining all variables and constants. (Hint, the material in U5 M3 under "Temperature Effects" may prove useful).Given:R = 0.008314K1 = 5 E-08T1 = 70 °C = 273.16 KT2 = 24 °C = 297.15 KEa = 73 kJ/mol

the answer is true.

both adhesion and cohesion are attractions.

they are different in that adhesion is the force of attraction between the molecules of two different substances, whereas cohesion is the force of attraction between molecules of the same substance.

possible examples include capillary action, in which the adhesion between water and glass causes the water to rise in a narrow tube against the force of gravity.

because of hydrogen bonding, water is extremely cohesive.

this causes molecules on the surface of water to be drawn inward, which is why drops of water form beads on smooth surfaces.

hope this .